GB/T 32523-2016Acoustics—Measurement of sound pressure reflection coefficient, sound pressure transmission coefficient and absorption coefficient for underwater acoustical material sample—Travelling wave tube method (English PDF)
声学 水声材料样品声压反射系数、声压透射系数和吸声系数的测量 行波管法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
February 24, 2016
Implementation date
September 1, 2016
Scope
GB/T 32523-2016 is the English-translated version of 声学 水声材料样品声压反射系数、声压透射系数和吸声系数的测量 行波管法.
GB/T 32523-2016 is the Chinese standard "Acoustics—Measurement of sound pressure reflection coefficient, sound pressure transmission coefficient and absorption coefficient for underwater acoustical material sample—Travelling wave tube method".
Its scope clause reads: This standard specifies the use of traveling wave tube method to measure the acoustic pressure reflection coefficient, sound pressure transmission coefficient and sound absorption coefficient of the underwater acoustic material (or component) The device, principles, conditions and methods.
This standard applies to the plane layered underwater acoustic material (or component) sample (hereinafter referred to as sample) in the temperature, pressure conditions 100Hz ~ (Or echo reduction), sound pressure transmission coefficient (or insertion loss), and sound absorption coefficient in the 3150 Hz band. Its clauses include normative reference documents; terms and definitions.
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Document preview — GB/T 32523-2016
National Standard of the People's Republic of China
- ICS
- 17.140
- Classification
- A 59
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 normative reference documents
- 3 terms and definitions
- 3.1 Underwater Acoustic Materials
- 3.2 Traveling wave tube
- 3.3 Sound pressure transmission coefficient
- 3.4 Sound pressure reflection coefficient
1 Scope
This standard specifies the use of traveling wave tube method to measure the acoustic pressure reflection coefficient, sound pressure transmission coefficient and sound absorption coefficient of the underwater acoustic material (or component)
The device, principles, conditions and methods.
This standard applies to the plane layered underwater acoustic material (or component) sample (hereinafter referred to as sample) in the temperature, pressure conditions 100Hz ~ (Or echo reduction), sound pressure transmission coefficient (or insertion loss), and sound absorption coefficient in the 3150 Hz band.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
Terminology of acoustics nouns GB/T 3947-1996
GB/T 14369-2011 Method for measuring insertion loss, echo reduction and sound absorption coefficient of acoustic underwater acoustic material samples
3 terms and definitions
The following definitions and definitions, as defined in GB/T 3947-1996 and GB/T 14369-2011, apply to this document.
3.1 Underwater Acoustic Materials
In the water sound engineering, with a specific acoustic properties of the material.
3.2 Traveling wave tube
In which a plane traveling wave is generated and propagated, a liquid-filled waveguide for measuring the samples and components of the underwater acoustic material, or for calibrating the hydrophone.
Note. traveling wave tube generally use the wall thickness is not less than the radius of the tube stainless steel tube.
3.3 Sound pressure transmission coefficient
Under the given frequency and environmental conditions, the plane acoustic waves in the water medium are incident on the surface of the infinite plate-like sample, and the transmitted sound pressure and the incident wave
Pressure ratio.
Note. In the case of actual measurement, the limited size sample is equivalent to an infinite sample with the edge effect negligible.
[GB/T 14369-2011, definition 3.4]
3.4 Sound pressure reflection coefficient
Under the given frequency and environmental conditions, the plane acoustic wave in the water medium is incident on the surface of the infinite plate sample, and the reflected sound pressure and the incident wave […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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